Belwith Products 1132 3-1/2 Inch 7mm Replacement Threaded Spindle for Most Mortise Type Door Knobs (Pack of 2) 2 Pack 3-1/2" Replacement Spindle/Spindle Spindle size: 7mm Threaded steel replacement spindles for interior mortise type locks or latch sets Chrome finish For Interior Mortise Type Locks